Answer:
False
Explanation:
The majority of cardiac muscle cells also known as cardiomyocytes of myocardiocytes have one nucleus even though they might have as many as four.
Phototaxis is movement in response to which stimulus?
Answer:
Phototaxis is a movement in response to light
Answer:
Light
Explanation:
Phototaxis is a kind of taxis, or locomotory movement, that occurs when a whole organism moves towards or away from a stimulus of light. This is advantageous for phototrophic organisms as they can orient themselves most efficiently to receive light for photosynthesis.
Which is the answer for it? I will appreciate the help
Earth's tectonic plates
A.
do not move.
B.
move only up and down.
C.
are constantly in motion.
D.
move only once.
Answer:
The answer is C
Explanation:
Tectonic plates, the massive slabs of Earth's lithosphere that help define our continents and ocean, are constantly on the move.
In snapdragon plants, they can be red (dominant) or white (recessive). However, when you have a heterozygous plant, the flower is actually pink (incomplete dominance).
Two pink flowers are crossed.
Genotype possibilities:
RR:
Rr:
rr:
Phenotype possibilities:
Red:
Pink:
White:
Please help
It would be easier to put an image instead of explaining it. Here you are!
R = Red
r = white
RR = 25% - 25% chance of red
Rr = 50% - 50% chance of pink
rr = 25% - 25% chance of white
Use the following information to answer the following question below. Moss invades and establishes itself on bare rock, accumulating the beginnings of soil. After several years, enough soil has become established that grasses begin to grow where there was once bare rock. Without the moss building up soil, the grasses would have had no chance. The establishment of the mosses on bare rock and eventual addition of grasses represents intermediate succession. secondary succession. a climax ecosystem. primary succession.
Answer:
Primary succession.
Explanation:
Ecological succession refers to the changes involved in the species structure of a community that is established in a particular habitat over time. The succession is of two types: the primary succession and secondary succession.
When the succession takes place on the barren land then succession is considered primary succession.
In the given question, the moss invades and colonizes the rocks and breaks them into the soil. Here the moss species is known as the pioneer species and since the moss grows on the barren rock, therefore, is considered the primary succession.
Thus, primary succession is correct.
LESSON REVIEW
1. Which trophic level provides nourishment for the most organisms in the
biome?
amers
B. secondary consumers
C. producers
D. decomposers
2. A seed is eaten by a chipmunk. The chipmunk is eaten by a snake. The
snake is earen by an acle. Which of the statements about this acnee
Answer:
1.C
2.its a secondary consumer
Explanation:
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Human pathogens typically fall into the group called
Human pathogens typically fall into the group called microorganisms which include bacteria, viruses, fungi, and protozoa. Pathogens are responsible for causing various diseases in humans.
Explanation:Human pathogens typically fall into the group called microorganisms. Microorganisms are tiny living organisms, which are usually microscopic and include bacteria, viruses, fungi, and protozoa. These pathogens are responsible for disease in their host.
For example, bacteria, such as Escherichia coli, can cause food poisoning, and viruses, like the influenza virus, can cause the flu. Alternatively, fungi can lead to infections like Athlete's foot and protozoa can result in diseases such as malaria.
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Tasting involves many different cell-signaling processes that ultimately generate nerve signals transduced by membrane depolarization. Sweet tastes result in PIP2 hydrolysis, while salty tastes allow sodium ions to directly alter the membrane potential. What can you deduce about the signaling mechanisms for sweet and salty?
Choose one or more:
A. Sweet ligands bind to and close sodium channels, which starts a membrane potential.
B. Sodium ions directly enter the cells, indicating the signal is transduced by an ion channel.
C. Sweet and salty signaling pathways use the same taste receptor molecule, but with different efficacy on the sweet and salty taste center in the brain.
D. Sweet utilizes the GPCR signaling pathway, activating phospholipase C.
Answer:
B. Sodium ions directly enter the cells, indicating the signal is transduced by an ion channel.
D. Sweet utilizes the GPCR signaling pathway, activating phospholipase C.
Explanation:
The taste received by the taste buds is processed through different channels
a) The Sweet, bitter, and umami tastes are transduced by the GPCR (G-protein-coupled receptors) signaling pathway
b) Sour taste reaches the taste bud through the acidification of acid-sensitive membrane proteins with in the taste cell
c) The epithelial sodium channels in the renal tissues directly takes up the salty taste
Hence, option B and D are correct
Muscle is an example of which level of organization?
A plant cell is an example of which level of organization?
Our skeleton is an example of which level of organization?
Explanation:
muscle is an example ofthe tissue level of organization
a plant cell is an example of the cell level of organization
our skeleton is an example of the system level of organization☺
Which of the following would increase the effect of erosion in a watershed? *
1 point
floodplains
steep slope
lack of soil
abundant plant life
During which stage of mitosis do the chromosomes attach to the spindle fibers and line up in the center of the cell
Anaphase
Interphase
Metaphase
Telophase
Answer:
The answer is
Explanation:
Metaphase
Answer:
the answer is c!!!! i took the test so i know its c
Explanation:
Which statement below is TRUE?
A)Crossing over shuffles genes between non-homologous chromosomes.
B)During meiosis, cells arrange their alleles so that beneficial alleles are passed on together.
C)Without crossing over, offspring would be genetically identical to parents.
D)New combinations of alleles arise from the random events of crossing over, independent assortment, and mutation.
Answer:
I think it is C.
Explanation:
C)Without crossing over, offspring would be genetically identical to parents.
Without crossing over in meiosis , offspring would be genetically identical to parents.
Meiosis is a type of cell division which occurs twice and forms four unique
daughter cells which have only one copy of chromosome from the parent.
This is as a result of the crossing over of the chromosome so that the parent
and offspring can have unique genetic makeup.
Meiosis is involved in sexual reproduction during the production of sperm and egg cells.
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What is a cell that would have a high rate of cell division
Explanation:
The highest rate of cell division is a human embryo. Once the sperm finds a viable egg in fallopian tube, it travels to the uterus. Attaches to the uterus where it is called a zygote then begins to multiply rapidly, along with the placenta (from which the developing embryo gets o2, food source, all nutrients a fetus needs to grow,to develop the unborn fetus..
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An organism in which a parasite or virus lives is called a
Answer:
the answer is a parasite
Answer:
A Host
Explanation:
If a parasite is living, its not going to live on something it can't benefit from, this is called a host.
Think of a cat with fleas, would a flea (the parasite) live on another parasite? NO
THEY WOULD LIVE ON A HOST
Berkowitz and LePage (1967) found that frustrated men delivered more shocks when Group of answer choices
A) they were initially depressed.
B) badminton racquets happened to be in the room.
C) they had just received a shot that lowered their serotonin levels.
D) guns happened to be in the room.
Answer: D. Guns happened to be in the room.
Explanation: In studying different concepts of aggression, Berkowitz and Lapage(1967) found out that in their experiment, frustrated men delivered more shocks to their partners when guns rather than badminton racquets happened to be in the room.
The citric acid cycle is a stage of catabolism that oxidizes acetate into carbon dioxide and generates energy. There are eight enzymes involved in the citric acid cycle.
Which enzymes have an α‑keto acid substrate?
A. fumarase
B. α‑ketoglutarate dehydrogenase
C. malate dehydrogenase
D. citrate synthase
Answer:D
Explanation:
The loss of an organism at the bottom of a food chain negatively impacts all organisms in the chain.
Please select the best answer from the choices provided
От
OF
Answer:
True
Explanation:
It would break the natural order each row dying or having to adjust messing up another food chain
The seed color of the garden pea was used to derive Mendel's two laws: segregation and independent assortment. Now, we know that the Y allele codes for the enzyme converting green to yellow chlorophyll. The mutant allele, y, is caused by a loss-of-function mutation on this gene. Let's assume that this mutation manifests its phenotype through the haploinsufficiency mode. Answer the following questions.
P YY (Yellow) x yy (Green)
F1 Yy (?) x Yy (?)
F2 1YY (?) : 2Yy (?): 1yy (?)
1. Which color would be recognized as a dominant trait, and what would be ratio of F2 between Yellow and Green seeds? (You need to explain why)
2. In this situation, which breeding scheme should be the proper testcross and what will be the outcome of this testcross? (You also need to explain why)
Answer:1.Yellow color will be dominant and the ratio is Yellow to green allele is 3:1
2.A recessive test cross should be appropriate.The result will be all yellow colored pea plants.
Explanation:
Since Yy x Yy produces
1YY,2Yy and 1yy then it shows that YY and Yy are 3 yellow pea plants and 1yy green pea plant.
A recessive test cross should be used because a recessive genotype being homozygous can be noticed by its physical appearance
How does carbon become locked inside the earth?
A) tree roots expel carbon into the soil as they grow
B) humans use machines to pump carbon into large underground tanks
C) rocks become richer in carbon as time goes on
D) the carbon-rich bodies of plants and animals decay into the earth after they die
Answer:
a) tree roots expel carbon into the soil as they grow.
Explanation:
Roots offer physical anchoring to the soil of the tree, with water uptake and inorganic nutrition as its principal activity.
The absorption and the transfer of ions and the growth and maintenance of the roots themselves require energy, therefore releasing CO2 into the ground and into the air.
A diverse ground microbiota exists underneath the earth in addition to the plant roots. Their work results in carbon dioxide being released into the soil, which flows into the air. This soil microbiota is responsible for decomposing the litter and, in general, any dead organic matter in the soil. It may breathe more than half of the total soil respiration. Soil temperature and humidity strongly affect root and microbial activity. In warm and moderately moist soils, soil breathing is highest.
The correct answer to how carbon becomes locked inside the Earth is option D: the carbon-rich bodies of plants and animals decay into the earth after they die.
Explanation:This natural process is part of the carbon cycle, where carbon is stored in soil as organic carbon due to the decomposition of living organisms by decomposers or from the weathering of terrestrial rock and minerals. Over long periods, this material might be buried and converted into fossil fuels, which are a type of non-renewable resource because they are regenerated very slowly, if at all. These fuels include coal, oil, and natural gas, which are the anaerobic remains of plants and algae that lived millions of years ago.
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Which symbolizes a molecule of a compound
He
Be
N2
NaCl
Answer:
NaCl
Explanation:
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The forward and reverse PCR primers used for the amplification of a VNTR locus on chromosome number 4 are 20 bases and 21 bases long, respectively. The 3’ base of the forward primer is 53 bases away from the first repeat. The 3’ base of the reverse primer is 28 bases away from the first repeat in that direction. Each repeat unit is 60 bases in length. A person has, on one of their number 4 chromosomes, 6 repeats. How long (in bp) should its PCR product be?
The repeats which occur together on a chromosome are referred to as VNTR. The length of each repeat is 60bp.
The first primer is 20bp and is 53 bp away from 1st repeat. Therefore, the total length of sequence amplified by the first primer till 1st repeat = 20+53 = 73bp. Beyond this point 6 repeats on 60 bp are present, hence, the length becomes = 73 + (60X6) = 433bp.
Now the reverse primer which is 21bp in length is located 28bp from the repeat on its side. Reverse primer comes from the opposite direction, so it must be present after the 6 repeats.
The total length of the amplified region = 433 + 28 + 21 = 482 bp.
The PCR product for the given VNTR locus on chromosome number 4 should be 482 base pairs long.
Explanation:The PCR product length can be calculated by adding the lengths of the forward primer, the reverse primer, and the number of repeat units, including the sequences between them. The forward primer is 20 bases long, and its 3' base is 53 bases away from the first repeat. Therefore, the forward primer covers 20 + 53 = 73 bases. Similarly, the reverse primer is 21 bases long and its 3' base is 28 bases away from the first repeat. Hence, the reverse primer covers 21 + 28 = 49 bases.
Each repeat unit is 60 bases long, and the person has 6 repeats. So, the length of the repeat units is 60 * 6 = 360 bases.
To calculate the PCR product length, add the lengths of the forward primer, the reverse primer, and the repeat units: 73 + 49 + 360 = 482 bases. Therefore, the PCR product should be 482 base pairs long.
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Which major environmental factors can affect health?
genetics and obesity
poor water quality and obesity
poor air and water quality
genetics and poor air quality
Answer:
The answer is poor air quality and water quality
Answer:
poor air and water quality
Explanation:
You are counseling a young Greek couple because both parents and their first-born son have been tested and found to be carriers of Beta thalassemia, an autosomal recessive severe hemoglobinopathy. They wish to know whether a current pregnancy is likely affected. Explain
Answer&Explanation:An individual with an autosomal dominant disorder, has a single mutant gene unless when their both parents are affected.
A person will have an autosomal dominant disorder if only a single parent is affected and if parent have autosomal dominant disorder only there is a 50% of inheriting a mutant gene.
In autosomal recessive disorders a person will get Ill if they inherit both mutant genes from both parents who are carriers . This person will be homozygous for the gene and will be affected by the disorder and this is highly likely to happen in their baby since they are both the carriers of this disorder.
Answer:
Beta thalassemia is an autosomal recessive disorder. It is usually inherited by children if both parents are carriers. It is a blood disorder that is characterized by decreased production of hemoglobin. Hemoglobin is an important protein in red blood cells that binds oxygen to be transported to other cells in the body.
Pregnant women with beta thalassemia can develop anemia due to the stress and other underlying factors. This can increase the chances of premature delivery. She may need more frequent blood transfusions during the pregnancy period for her health and the health of the baby.
In which of these ways might an ectotherm respond to changes in environmental temperature?
fight or flight
Answer: move elsewhere b
Explanation:
Answer: b
Explanation:
List two reasons why food is important.
Answer:
gives you energy, and for some animals helps them survive winter (bears)
Explanation:hope this helps god bless
1. Vitality.
A healthy diet has you glowing with vitality outside and in. Healthy food leaves you feeling energetic and raring to go!
2. Preserving youthful looks.
Healthy eating keeps your skin supple and radiant, your eyes bright and your hair in good condition.
a. Bacteriophage MS2 carries its genetic information in RNA. Its chromosome is analogous to a polygenic molecule of mRNA in organisms that store their genetic information in DNA. The MS2 mini-chromosome encodes four polypeptides (i.e., it has four genes). One of these four genes encodes the MS2 coat protein, a polypeptide 129 amino acids long. The entire nucleotide sequence in the RNA of MS2 is known. Codon 112 of the coat protein gene is CUA, which specifies the amino acid leucine. If you were to treat a replicating population of bacteriophage MS2 with the mutagen 5-bromouracil, what amino acid substitutions would you expect to be induced at position 112 of the MS2 coat protein (i.e., Leu —> other amino acid)? (Note: Bacteriophage MS2 RNA replicates using a complementary strand of RNA and base-pairing like DNA.)
b.Would such mutations occur if a non-replicating suspension of MS2 phage was treated with 5-bromouracil?
Final answer:
Amino acid substitutions at codon 112 in MS2 phage could occur due to mispairing caused by the mutagen 5-bromouracil during replication, potentially resulting in a different amino acid being coded. However, mutations would not occur in a non-replicating suspension of MS2 since 5-bromouracil incorporation requires active replication.
Explanation:
If you were to treat a replicating population of bacteriophage MS2 with the mutagen 5-bromouracil, you might expect amino acid substitutions at codon 112 of the MS2 coat protein, which commonly specifies the amino acid leucine (Leu). Given that 5-bromouracil can substitute for thymine in DNA replication, and considering RNA's analogous base uracil, during RNA replication, this mutagen could potentially cause uracil to mispair, leading to a substitution mutation. Specifically for codon 112 (CUA), a possible mutation could turn it into UUA which would likely also code for leucine, or into CUG, which also encodes for leucine due to the degeneracy of the genetic code. A more significant change, such as substituting cytosine with uracil, creating UUA or UUG, could result in a phenylalanine being placed instead of leucine, since these codons specify phenylalanine.
For the second part of the question, mutations from 5-bromouracil would not occur in a non-replicating suspension of MS2 phage since mutations require nucleic acid replication for incorporation into the genetic material, and 5-bromouracil would not be incorporated without active replication.
Omega-3 and omega-6 essential fatty acids are readily available in leafy green plants. What is one way to ensure that animals raised for commercial purposes have enough of these fatty acids in their diets such that fatty acid supplementation is not needed
Answer:
Omega-3 and omega-6 essential fatty acids are readily available in leafy green plants. One way to ensure that animals raised for commercial purposes have enough of these fatty acids in their diets such that fatty acid supplementation is not needed is to allow the livestock adequate environment for natural grazing.
Explanation:
Animals raised on pasture are generally healthier and under less stress than those raised in confinement, making them hace omega-3 and omega-6 readily available in leafy graan plants. Pasture-based livestock farming reintegrates the cycle, putting livestock on grass or in another natural environment. These types of systems are also climate friendly.
To ensure that animals raised for commercial purposes get enough omega-3 and omega-6 essential fatty acids, natural grazing is encouraged. This practice enables the animals to obtain these vital nutrients from their diet directly, eliminating the need for supplements. Grass-fed animals typically have higher quantities of these fatty acids.
Explanation:One way to ensure that animals raised for commercial purposes have enough omega-3 and omega-6 fatty acids in their diets without requiring fatty acid supplementation is by facilitating natural grazing. Leafy green plants are rich sources of these essential fatty acids. If commercial animals are allowed to graze naturally, they can obtain these essential nutrients directly from their diet.
By facilitating natural grazing, animals can get a balanced amount of essential fatty acids from their diets.Grass-fed animals have generally been shown to have higher amounts of omega-3 and omega-6 fatty acids in their meat as compared to animals fed with commercially prepared feed.This approach also supports the sustainability of farming practices and respects the animals' natural dietary needs.Learn more about Essential Fatty Acids here:https://brainly.com/question/12771870
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Desquamation occurs in which layer
Answer:
Desquamation occurs in the outermost layer of the skin.
Explanation:
Desquamation is also known as skin peeling and it occurs in the outermost layer or membrane of a tissue such as the skin .
Research suggests that eating lots of fruits and vegetables may provide some protection against several types of cancer. Studies have revealed that the risk of getting cancer associated with the lowest intakes of fruits and vegetables is twice as high as that associated with the highest intakes. This association holds for several types of cancer, including cancers of the breast, colon, pancreas and bladder.
Answer:
So is; It has been shown, for example, in breast cancer that women who eat a lot of fruits and vegetables every day may have a lower risk of breast cancer, especially aggressive tumors, than those who consume less vegetables, according to a new study conducted by researchers at the TH Chan School of Public Health in Boston, United States. Cruciferous vegetables such as broccoli and yellow and orange vegetables stand out especially.
Explanation:
The plant-based foods that the researchers studied for cancer prevention are:
Cruciferous vegetables. They include broccoli, cauliflower, cabbage, Brussels sprouts, Chinese cabbage, and green cabbage. Frequent consumption of these foods is associated with a reduced risk of cancer.
Studies show that cruciferous vegetables provide protection against:
- Head and neck cancer.
- Esophagus cancer.
-Stomach cancer.
Several laboratory studies suggest that cruciferous vegetables help regulate enzymes that protect against cancer. Studies also show that cruciferous vegetables can stop the growth of cancer cells in other ways. But these effects can differ between cells, laboratory animals, and people.
Lycopene. This carotenoid is found in products derived from tomato. Other important sources of lycopene are pink grapefruit, watermelon, and apricot.
Studies show that lycopene can provide cancer protection from:
-Lung
-Stomach
-Prostate
-Colon
The Z disc is the: Group of answer choices separation between sarcomeres. electrical voltage at which a muscle cell fires an action potential. area of a sarcomere where only thick myofilaments are found. point where the axon and the sarcolemma meet. place where two cardiac muscle cells meet.
Answer:
Separation between sarcomeres.
Explanation:
The structure of the muscle fibre is composed of many functional units called sarcomere which is interrupted by the discs called Z-discs.
These Z-discs are made of the alpha-actin homodimers which allow the actin filament allows to bind to it along with other proteins. The Z-discs since present at regular intervals in a muscle appears to separate the sarcomere and defines the boundaries of the sarcomere.
Thus, the selected option is correct.